[sdiy] David's sortof biquad filter

[Harry Bissell Jr]

Also at OTA2... I think it should be connected 
to the inverting input of the opamp or you are
missing an integrator ???

H^) harry


--- Don Tillman <don at till.com> wrote:

>    > Date: Mon, 18 Dec 2006 07:21:26 -0800 (PST)
>    > From: Harry Bissell Jr
> <harrybissell at prodigy.net>
>    > 
>    > Either the schematic is wrong or he's
>    > done something really strange on the
>    > non-inverting input to OTA2... the
>    > 470 ohm is in the wrong place imho...
> 
> And I believe there's a polarity issue in the
> feedback loop.
> 
>   -- Don
> 
> -- 
> Don Tillman
> Palo Alto, California
> don at till.com
> http://www.till.com
> 
>